The cylinder liners are made of _____ and the cylinder surfaces are sometimes chromium-plated.
A.steel
B.copper
C.cast iron
D.stainless steel
正确答案：C
Thecylinderlinersaremadeof_____andthecylindersurfa
本文来自网络，不代表煤炭资讯立场。转载请注明出处： http://www.mtxh.cn/bk/wd-bk/124610.html
